Note 10 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value (USD $)	Dec. 31, 2013	Sep. 18, 2013	Feb. 22, 2013	Jan. 16, 2013	Dec. 31, 2012	Dec. 31, 2011
Liabilities
Convertible notes	$ 4,537,000				$ 8,098,000
Warrant and option liabilities	2,680,000
Warrant liabilities	2,680,000				3,800,000
Total Liabilities	7,217,000	13,537,000	17,490,000	12,592,000	11,898,000	6,927,000
Fair Value, Inputs, Level 3 [Member]
Liabilities
Convertible notes	4,537,000				8,098,000
Warrant and option liabilities	2,680,000
Warrant liabilities					3,800,000
Total Liabilities	$ 7,217,000				$ 11,898,000